Caster-frame



(No Model.)

J. J. SULLIVAN.

OASTER FRAME.

No. 394,310. Patented Dec. 11, 1888.

INVENTOR I ATTORNEYS.

UNITED STATES PATENT OFFICE.

JAMES J. SULLIVAN, OF BROOKLYN, NElV YORK.

CASTER-FRAM E.

SPECIFICATION forming part of Letters Patent No. 394,310, dated December 11, 1888.

Application filed January 25, 1888. Serial No. 261,853. (No model.)

To aZZ whom it may concern:

Be it known that I, JAMEs J. SULLIVAN, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Caster-'hrame, of which the following is a full, clear, and exact description.

M y invention relates to an improvement in caster-frames, and has for its object to provide a means whereby when cast crs are insert ed in a chair or other article of 'fl'llllll'lll'G the same will be prevented from tipping over.

The invention consists in the (amstruction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in-which similar letters of reference indicate eorrespomling parts in both the figures.

Figure 1 is a perspective view of a complete caster embodying my improvement, and Fig. 2 is a perspective view of the frame.

It is well known that with the ordinary caster-frame, when attached to a chair, should a person sit too near the front edge and lean forward the chair will suddenly tilt and often cause serious shock or damage, and the same is true when the chair is rolled too far back and drawn suddenly forward again. To obviate this difficulty is the aim of the present invention, and in carrying out the same the frame A, in which the wheel b is journaled, is provided at the base with horizontally-aligning integral arms or lugs D, which arms or lugs at each side of the wheel-bearings are projected a distance beyond the periphery of the wheel, as illustrated in Fig. 1.

The arms or lugs may be cast to project horizontally from the base of the vertical member of the ordinary frame; or the frame may be made more weighty and solid, as illustrated in Fig. 1, or more orless light and ornamental, as illustrated in Fig. 2 and, if found desirable, the extremities of the vertical members may be united by any approved form or style of brace.

It is evident that if a chair provided with a caster havingaframe constructed as above set forth should be sat upon so far forward as to cause the same to tilt suddenly and drive the caster-wheel back the progress of the said wheel will be almost immediately stopped by the engagement of one set of lugs or arms with the floor.

In order to distinctly present the difference between the ordinary caster-frame and my invention, I have dotted the contour of the firstnamed frame upon one side of the improved frame illustrated in Fig. 2.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- As an ew article of manufacture, a U shaped caster frame or horn, A, provided with apertures or bearings for the wheel-axis, and having the lower ends of its sides extending in front and rear of said apertures beyond the periphery of the wheel and below its axis.

JAMES J. SULLIVAN.

\Vitnesses:

J. F. ACKER, J r., C. SEDGwIcK. 

